| Summary: | Abstract We derive indirect limits on the charm and bottom quark electric dipole moments (EDMs) from paramagnetic AMO and neutron EDM experiments. The charm and bottom quark EDMs generate CP-odd photon-gluon operators and light quark EDMs at the c- and b-quark mass thresholds. These CP-odd operators induce the CP-odd semi-leptonic operator C S and the neutron EDM below the QCD scale that are probed by the paramagnetic and neutron EDM experiments, respectively. The bound from C S is |d c | < 1.3 × 10 −20 e cm for the charm quark and |d b | < 7.6 × 10 −19 e cm for the bottom quark, with its uncertainty estimated as 10 %. The neutron EDM provides a stronger bound, |d c | < 6 × 10 −22 e cm and |d b | < 2 × 10 −20 e cm, though with a larger hadronic uncertainty.
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